move to new skeleton

tutorials/webui/webui-rest/main.c

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+// Copyright (c) 2022 Cesanta Software Limited
+// All rights reserved
+//
+// REST basics example
+// It implements the following endpoints:
+//    /api/f1 - respond with a simple mock result
+//    /api/sum - respond with the result of adding two numbers
+//    any other URI serves static files from s_root_dir
+// Results are JSON strings
+
+#include "mongoose.h"
+
+static const char *s_http_addr = "http://localhost:8000";  // HTTP port
+static const char *s_root_dir = "web_root";
+
+static void fn(struct mg_connection *c, int ev, void *ev_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    if (mg_match(hm->uri, mg_str("/api/f1"), NULL)) {
+      mg_http_reply(c, 200, "Content-Type: application/json\r\n", "{%m:%d}\n",
+                    MG_ESC("result"), 123);
+    } else if (mg_match(hm->uri, mg_str("/api/sum"), NULL)) {
+      // Attempt to fetch a JSON array from the body, hm->body
+      struct mg_str json = hm->body;
+      double num1, num2;
+      if (mg_json_get_num(json, "$[0]", &num1) &&
+          mg_json_get_num(json, "$[1]", &num2)) {
+        // Success! create a JSON response
+        mg_http_reply(c, 200, "Content-Type: application/json\r\n", "{%m:%g}\n",
+                      MG_ESC("result"), num1 + num2);
+      }
+    } else {
+      struct mg_http_serve_opts opts = {.root_dir = s_root_dir};
+      mg_http_serve_dir(c, hm, &opts);
+    }
+  }
+}
+
+int main(void) {
+  struct mg_mgr mgr;                            // Event manager
+  mg_log_set(MG_LL_DEBUG);                      // Set log level
+  mg_mgr_init(&mgr);                            // Initialise event manager
+  mg_http_listen(&mgr, s_http_addr, fn, NULL);  // Create HTTP listener
+  for (;;) mg_mgr_poll(&mgr, 1000);             // Infinite event loop
+  mg_mgr_free(&mgr);
+  return 0;
+}